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Tyrolecrinus
Taxonomy
Tyrolecrinus was named by Klikushin (1982) [Sepkoski's age data: Tr Anis Tr Carn]. Its type is Pentacrinus tyrolensis.
It was assigned to Isocrinida by Sepkoski (2002); and to Isocrininae by Stiller (2011) and Hess and Messing (2011).
It was assigned to Isocrinida by Sepkoski (2002); and to Isocrininae by Stiller (2011) and Hess and Messing (2011).
Species
Species lacking formal opinion data
Synonymy list
| Year | Name and author |
|---|---|
| 1982 | Tyrolecrinus Klikushin p. 207 |
| 2002 | Tyrolecrinus Sepkoski |
| 2011 | Tyrolecrinus Hess and Messing p. 56 |
| 2011 | Tyrolecrinus Stiller p. 1418 |
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
G. †Tyrolecrinus Klikushin 1982
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†Tyrolecrinus separatus Mu and Wu 1974
†Tyrolecrinus tyrolensis Laube 1865
†Tyrolecrinus wugangi Stiller 2011
Diagnosis
| Reference | Diagnosis | |
|---|---|---|
| F. Stiller 2011 | Stem of small diameter, pentalobate (subcircular to subpentagonal to pentalobate to subpentastellate), consisting of smooth columnals. Nodals about equal in size to internodals and bearing, generally at mid-height, five small to moderately sized, strongly deepened and laterally outwardly to obliquely downwardly directed cirrus sockets.
Noditaxes with generally less than 10 columnals. Articulations between nodals and infranodals cryptosymplectial to synostosial. All other articular facets of columnals symplectial with drop- to lancet-like petal floors surrounded by distinct crenulae oriented radially to peripherally. (Based on Klikushin 1982, 1983, emended herein.) |